Precision squeezek yoke



April 9, 1946, H s, SINES Re, 22,743

PRECIS ION SQUEEZER YOKE Original Filed Dec. 8, 1943 7/////////,/ /AIV/lsupporting bracket is adapted'toreceive Reissued Apr. 9, 1946 22,743PRECISIN SQUEEZER YOKE Harvey S. Sines,

Montebello, Calif., assignor to Consolidated Vultee AircraftCorporation, San Diego, Calif., a corporation of Delaware Original No.2,375,445, dated May 8, 1945, Serial No. 513,414, December 8, reissueJanuary 10, 1946,

9 Claims.

The invention relates to pressure operated tools. l i

Portable tools now in common use comprise a frame equipped with powermeans, such for` example as a cylinder and a piston, for the operationby pressure of a ram or tool which is slidably guided in the frame and athrust-receiving bracket with a device, such as a socket die, for thepunch or an anvil for a riveting tool. In the operation of thesedevices, the compression forces of the ram transmitted to the opposedthrustreceiving bracket, for the socket die when metal is to be piercedor the anvil when a rivet is to be upset, frequently cause bending in ordeflection of the bracket. This deflection causes the relationship ofthe normally coaxial punching tool and the socket to be changed, orangular varia? tion between the normally parallel opposed compressionfaces on the tool and the die or anvil. This results in lack ofprecision in punching or irregular upsetting in riveting and frequentlyresults in injury to the ram. In piercing holes where precision isnecessary, it is important to maintain parallelism of the opposedcompression faces and the co-axial relation of the punch and socket ordie in order to insure regularity and the true or desired axes oi theholes punched in the work. f

One object of the invention is to provide an improved tool of this typein which the power op erated ram or tool and the coactingthrust-receiving devices. such as a socket or anvil, are rigidlyconnected by a yoke which is supported at the end of thethrust-receiving bracket and supports the ram at its other end so thatany bending in or deflection of the bracket, produced by pressure` fromthe ram, will maintain the opposed compression faces in normallyparallel, or the punch and the socket-die in normally coaxial, relation,

Another object of the invention is to provide a 1943. Application forSerial No. 640,162

precision yoke-structure which may be used as an attachmentto the framesof power units.

Another object of the invention is to provide a portable punching deviceinwhich the punch and socket-die are conjointly movable by a rigid yokeso that their compressionfacesand axial relation will be maintainednotwithstanding any deflection of or bending in the thrust-receivingyokeduring the vpunching operation.

, Another object ofl the invention is to provide a pressure operableriveting toolinwhich the ram and the anvil are supportednby a rigid yokewhich the workY and which is supported f roma bracket in lsuch a mannerthat any means for the operation of Other objects of the invention willappear from the detailed description.

The invention consists in the several novel features hereinafter setforth and more'particularly defined by claims at In the drawing:

Fig. 1 is a side elevation of a power unit equipped with adeviceembodying the invention.

Fig. 2 is a perspective, parts being broken away, of the supportingbracket which is attached to the frame of the power unit and is providedwith an arm for receiving thrust through a socket-die and the yoke forsupporting the ram from the thrust-receiving end of the supportingbracket.

Fig. 3 is a section taken on line 3-3 of Fig. 1.

Fig. 4 is a section taken on line 4-4 of Fig. 1.

Fig. 5 is a section taken on line 5 5 of Fig. 1.

Fig'. 6 is a side elevation of a modified form of the invention.

Fig. 7 is a section taken on line 1--1 of Fig. 6.

The invention is exemplified in a portable unit which comprises a casingor frame l0 for'powermeans, such as a piston (not shown) operable bycompressed air-in a cylinder Il for operating a stem l2 which isslidably mounted in the frame l0 and adapted to shift a ram 29. The unitalso comprises a handle i3 and a throttle-lever i4 for manuallycontrolling the operation of the powerthe stem l2, all oi which may beof any suitable construction. In Figs. 1 to 5, the unit is exemplifiedas used for punching or piercing holes in a plate of metal and the ram29 functions as a punching tool.

A generally C-shaped bracket i6 is adapted to extend around orreceiveth'e work, such as the plates to be punched or pierced andlcomprises an arm I6* on the side of the ,work at which the power-meansis located, and an arm lh eX- tended tothe opposite side of the work,the arms being integrally connected b y the bend between them. The armI6a is provided with a groove I1 for receiving a flange i8 which isrigid or integral with the frame vlll and bolts I9 extend through saidflange and an extension on arm 16a of bracket I6 liEor rigidly attachingsaid arm to the frame l0 and supporting the bracket H5. The vend of armlh functions as a thrust-receiving member on-the side opposite the powerside. y

A pair of generally C-shaped rigid yokes 2l are the conclusion hereof .y

wenn functions ,as s penes,

disposed at the opposite sides of the bracket IE, respectively, Eachyoke comprises a member or arm 22 which extends to theend of thethrustreceiving arm I6b of bracket I6 and a member or arm 23 whichextends to the power or opposite side of the work.` The ends ofyokemembers 22 are rigidly secured by bolts 24 and dwel pins 25 to theend of arm |61. The arm I6b thus functions to support the yokes at theside opposite the side of the work where the pressure is applied by theram 29, from frame I at the opposite vside of the work. A guide block 21ts between the ends of yoke-members 23 and is xedly VVsecured to vsaidmembers by rivets 28 or may be Welded thereto so that the guide blockand the ends of yoke-members 22 will be rigidly secured andfthe guideblock will be supported through the, yokes from the thrust-receiving endof arm IBb of bracket IE. The ram 29 is slidably mounted in the guideblock 2 1 forVmovement to and from the. thrust-reeeivins erin, |56? by.,pressure fr Qm theprieunaticall-ypperable s tem -I2 Whichis4slidablygmounted in the frame I0. A coilspring between the guide block21 and a head A3| on the lfm idapd t0. lfert tn eflfam after a Pres"sure stroke. The ram 2 9fguided in the b-lock 21 ist thefpQWer siele 9ithewerk'is supseted by the rekes 2 lfwhieh are supported freni thethrustthe thrst-reeeivins end effith'e aim .l 6b ef breeka d theadjacent edge et f Band comprises a flange af Which'is ac iap'tedA toabut against said Af acemll. An opening va2 ex- `tends verticallythrough the arm 16h for vthe punch-2Q which passes Lthruigl1- the socketin lthe diej which coacts with the punch to pierce a plate. ,The socketin lthe die q land the ramV '29 when used with a socket-die, areco-axial and faces of Aheptinclggand the die La andbetween the y he dieandthe parallelism of the compression faces on the punch and -oh the diewill Will., th'e'il besesere-tediihder "ee'rt tofimpart adriving'st'roketo the metal will be piercel d between the compressionfaces onthe ram and the socket-die nthe'end In practice it isdesiredrte. eroi@ excessive Weiehsfnihe seieezer yo l n e in itsentirety/'because of the`r1eessity the" rcompression position of whichmay vary in hardness, is sometimes sucient to cause the pressure againstthe end of the thrust-receiving arm |61l to bend the racket I6 betweenthe arm I6b and the arm Hia which is rigidly secured to the frame I0.When this bending occurs, the 'arm |611 would be dee-c'td so itscompression `face 120 will be misaligned or shifted out of parallelismwith the normal plane of the compression face on the ram or so it willnot be perpendicular to the prolongavtion of the normal position of theaxis of the when the zram is supported in the arm Hin Vof vbracket 'IG'or in the frame IU. When this bending occurs 'in my construction, theyokes 2 block 2-1 and the ram 29 will be conjointly shifted ordeflected, 4the parallelism between the Acompression 'faces on the ram,and the socketdie will be maintained and the axis of the ram will remainperpendicular to the compression faces on the dieandthe face 20 on armI6 b and coaxially aligned with the socket in the die a. The ram willnot lie-subjected to injurious stresses thefstress o f compression offthe Jmetal at the-point of piercing will be distributed as des iredbetwe en compression faces notwithstanding the nding which has occurredin the the holes in the -work bracket 1 6, andprecis'ion inwiileeeehieveevIn Figs. 6 and'l-,the invention is illustrated for jin Yupsetting Vrivets. In this form of the invention, ythe stern Stof arivet-set 35 ts in the opening afin thethrus't-receivingarm 16h. The sethas e sn'aewhieh ebiifs aesinet 'the iep face 2p of th e a1rn lb:'I'herivet-'setis adapted tov-hold Ia rivet 3 6 which will be upset bytheram 2 3 and issubsti'tut'e'd 'for the socket-die a. In thisYrno'dicatjficir 1 the A compression -faes of the rivet-setaridbetwee--the rivetset and arm 16h, and v`t ;1 j1e compress onfaceonlthe ram or riveting tocl -2.9 wi 1 l be conjointly s hiftedordeflectedto maintain their nc'r'rnal relationshipr when thecompressionfores are sufficient, to produce a 'pd in1 1; e1prackt.lt-'between lits mns, as be- -fereseserieee-- Preferably dual syoke'sare .pr'o J ided for supend of the thrust-receiving arm to insure'against transverse move- `I ir1e1 1 t ofthe ram, but it will heunder-stood that in some instances as'in'gle lyoke may vsuflic'eAIflieyoke structure is Iadapted )to v'be atftaclieirl to vthe frame if'aportable power unit and may be `app1ied topowe r `units as asubstitute 'for brackets withoutlyokes.

The i r'i"/er 1tio n also Xeiripl'iiies ayoke'strUCture which isvadapted vfor diIereI-'t work, 'such as piercing andfrveting. 'Ilelyo'ke structure -i's y'sirnpleninwcoristruction'and Aefflc'ie'nt "in-opc ation, Darticular ly where, as aircrafujiecisin is reguiredin 'theworkjperfor'med bythe tools.

The invention i'snt to befundistood 'restricted ,fo the deal-ssa*fijamente thse r11-ay beiimciinec-wtn 1 @ne "scope 'f fthe 'appended-claims Without dpaftirfg "from "the spirit and ,siagneflits ci "dfnienuda, wrist 1 claim as new and *desire `t`o "sc're 4y Lett'sPatentls:

'1. 'fue combination with a portable iframe, power operable "means4viiio'unted `i'n""and po'r't'ably supported by `the Vfra-me, foroperation a ber having an end portion to which the thrustreceivingmember of thebracket is rigidly se cured and a member extending to thepower side of the work, and a ram operable by said power means foroperation kon the work and operably supported by the member of the yokeon the power side of the work, the yoke being adapted to support the ramfor maintaining normal working relationship between the ram and thethrustreceiving member ofthe bracket when pressure from the ram causesdeilection in the bracket.

2. The combination with a portable frame, a power operable stem mountedfor rectilinear sliding movement in the frame and portably supported bythe frame for operation at one side of the work, a portablesubstantially C-shaped bracket having one of its members connected toand supported by the frame and a thrust-receiving member on the oppositeside of the work, of a portable rigid yoke comprising a member having anend portion to which the thrust-receiving member of the bracket isrigidly secured and a member extending to the power side of the work,and a portable ram operable by said power means for operation on thework and slidably supported in the member of the yoke on the power sideof the work, the yoke being adapted to support the ram vfor maintainingnormal working relationship between the ram and the thrust-receivingmember of the bracket when pressure from the ram causes deflection inthe bracket.

3. The combination with a portable frame, power operable means mountedin and portably supported by the frame for operation at one side of thework, a substantially C-shaped bracket formed oi a single solid narrowwall with flat sidefaces, having one of its'members connected to andportably supported by the irame and a thrust-receiving member on theopposite side of the work, of a portable yoke, having a, pair of sidesin close relationship with the side-faces of the bracket, eachcomprising a member having an end portion to which is rigidly securedthe thrust-receiving member of the bracket and a member extending to thepower side of the work, and a portable ram operable .by said power meansfor operation on the work and operably supported by the member of th'eyoke on the power side of the work, the yoke being adapted to supportthe ram for maintaining normal working relationship between the ram andthe thrustreceiving member of the bracket when pressure from the ramcauses deflection in the bracket.

4. Th'e combination with a portable frame, a power operable stem mountedin and portably supported by the frame for operation at one side of thework, a portable substantially C-shaped bracket formed of a singlenarrow solid wall with substantially flat side-faces, having one of itsmembers connected to and portably supported by the frame and athrust-receiving member on the opposite side of the work, of a portablerigid yoke having a pair of sides in close relationship with theside-faces of the bracket, each side comprising a. member having an endportion rigidly secured to the thrust-receiving member f the bracket anda member extending to the power side of the work, a block ilxedlysecured between the ends of the yoke sides on the power side of theWork, and a ram slidable in and extending through said block andengageable by said stem for operation of the work, the yoke beingadapted to support the ram for maintaining normal working relationshipbetween the ram and the thrust-receiving member of the bracket whenpressure from the-.ram ,causes deiiection in the bracket; .Y

5. The combination with a portable frame, a power operable stem slidablymounted in and portably supported by the frame for operation at one side`of the work, a portable substantially C-shaped .bracket formed of asingle narrow solid wall withsubstantially dat side-faces, having one ofits-members connected to and lportably supported by the frame and athrust-receiving member on the opposite side of the work, of a portablerigid yoke having a pair of sides in close relationship with theside-faces of the bracket, each side comprising a member having an endportion rigidly secured to' the thrust-receiving member of the bracketand a member extending to the power side of the work, a block xedlysecured between the ends of the yoke-sides on the power side of thework, a ram slidable in and extending through said block and engageableby said stem for operation on the work, the yoke being adapted tosupport the stem for maintaining normal working relationship between thestem and the thrustreceiving member of the bracket when pressure fromthe ram causes deiiection in the bracket, and a spring between the ramand the block for retracting the ram.

6. The combination with a portable frame, a power operable stem slidablymounted in and portably supported by the frame for operation at one sideof the work, a portable substantially C-shaped bracket formed of asingle narrow solid wall with substantially flat side-faces, having oneof its members connected to and portably supported by the frame and athrust-receiving member on the opposite side of the work, of a portablerigid yoke having a pair of sides in close relationship with theside-faces of the bracket, each comprising a member having an endportion rigidly secured to the thrust-receiving member of the bracketand a member extending'to the power side of the work, a block fixedlysecured between the ends of the yoke-sides at their ends cn the powerside of the work, and a riveting tool slidable in and extending throughsaid .block and operable by said stem for operation on the work, and ananvil carried by the end of the thrustreceiving member of the bracket,the yoke being adapted to support the ram for maintaining normal workingrelation between the ram and the thrust-receiving member of the bracketwhen pressure from the ram causes deiiection in the bracket.

'7. A unit for attachment to a portable frame carrying power meanscomprising a portable substantially C-shaped bracket having ione of itsmembers provided with means for detachably connecting it to andsupporting it from the frame and an integral thrust-receiving member onthe opposite side of the work, a substantially C- shaped portable yokecomprising sides in close relation to the bracket, each side having amember with an end portion to which the thrust-receiving member of thebracket is rigidly secured and a member extending to the power side ofthe bracket, a tool slidably mounted between the ends of the yoke at thepower side and a co-acting die carried by the end of the member of thebracket at the thrust side of the work, the yoke being adapted tosupport the tool for maintaining normal work relationship between `thetool and the die when pressure from the tool causes deflection in thebracket.

8. A unit for attachment to a portable frame carrying power meanscomprising a portable substantially C-'shaped'solid narrow 'bracket oneof its members detachably connectabletonnd adapted Yto `be portably'supported by thefiframe, and an integral thrustmeceivng member 'on `theopposite side of 'the fwork, asubstantialy 'cshaped portable "yokecomprising sides :in fclose relation to the. sides 'ofthe bracket. .eachsid'ezh'av-- ing a member'with :ain end 'portionto'whoh'thethrust-.receiving member :of .the bracketrigidly secured and a'member`(attendingtothe .power side of the bracket, .a block xedto the of Isaidyoke members adjacent the power side @i `the bracket between the yoke Iatool 'slida'bly mounted in the block for operation lby the 'power means,a spring between vthe-tool and the :block for retracting the tool .and a-co-,acting die carried by the .end of the .member of vthe bracket :atthe thrust side of the work, the yoke being adapted to support the tool'for maintaining normal work relationship betweenfthe .t'ol and the diewhen pressure lfrom the itool `causes deiiection in the bracket.

v9. A unit attachment to a portable frame :carrying power means`comprising va Vportable .sub-

stantally .C-sha'ped-bracket having a solid narrow wail undone .of `itsmembers detaehably connectabie to and .adapted to be portably sup-portedbythe frame, and an integral thrust-receiving merriiberk on .theopposite .side of the work, a substafntially C-shaped portable `yokecomprising sides 1in, close relation to the sides of the bracket, eachside .having a member `with 'an end portion to which the`thrust-receiving member of the bracket is rigidly .secured and a memberextending to 'the power Iside of the bracket, a block fixed to the vendsof said yoke members adjacent the power side of the bracket; and betweenthe yokesides, a riveting tool slidably mounted in the block foroperation by the power means, a spring between the tool and the blockfor retracting the tool, and an anvil carried by the end of thememberfof the bracket at the thrust side of the work,

Y the yoke being adapted to support the tool for maintaining normal Workrelationship between the ltool and the anvil when pressure from the toolcauses deection in the bracket.

HARVEY S. SINES.

